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50 Smart Black/Whiteboard Cleaning System
Lan Li
Yichen Gu
Luke Wendt design_document0.pdf
Although powerpoint is widely used in presentation nowadays, black/whiteboards are still not replaceable in some situations. After a long presentation or lecture, it is very possible for the presenter to forget cleaning the board. It is OK if the board is filled with lecture notes. But if the it is confidential information, there will be a problem. Also it is a hassle for professors to clean up the black board every time it is all written.

We would like to design a cheap black/whiteboard cleaning system. By simply waving a hand at a motion sensor mounted beside the blackboard, the brush will go from one side to the pin location you previously put on, and travel back, brushes 2 times in total. More details and functionality are presented below.

Technical Details:
This project will contain three modules:

Brush module: A vertically placed brush pressed to the board.

Motor module: Sliding rail on top and bottom of the board. 2 motors on each side of the rail to drag a wire attached to the rail, to move the brush.

Control module: This module contains three different submodules.
Wave-Clean: An ultrasonic sensor on the side of board, facing upwards. When presenter wave his/her hand at the sensor, board is cleaned.
Leave-Clean: Motion sensors around the room. When no movement for 5mins, clean the board
Partial-Clean: Presenter can put a locating pin on the rail. The brush will then move from the side to the pin, and only cleans part of the board.

It will also include a small rechargeble battery pack to power the motor.

RFI Detector

Jamie Brunskill, Tyler Shaw, Kyle Stevens

RFI Detector

Featured Project

Problem Statement:

Radio frequency interference from cell phones disrupts measurements at the radio observatory in Arecibo, Puerto Rico. Many visitors do not comply when asked to turn their phones off or put them in airplane mode.


We are planning to design a handheld device that will be able to detect radio frequency interference from cell phones from approximately one meter away. This will allow someone to determine if a phone has been turned off or is in airplane mode.

The device will feature an RF front end consisting of antennas, filters, and matching networks. Multiple receiver chains may be used for different bands if necessary. They will feed into a detection circuit that will determine if the power within a given band is above a certain threshold. This information will be sent to a microcontroller that will provide visual/audible user feedback.

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